We do not understand the way neural circuitry works. One of the
chief lacks is the understanding of reverberation. A second lack is
understanding the dynamics of learning and how this is affected by
reverberation. CAs use reverberation and learning, so CAs can be used
to study them. By simulating computational and psychological tasks
with networks of neurons that have CAs, we can better understand human
intelligence. Moreover, by understanding systems of CAs we can build
systems with novel capabilities.